Practical Analytical Model and Comprehensive Comparison of Power Loss Performance for Various MMCs Based on IGCT in HVDC Application
Practical Analytical Model and Comprehensive Comparison of Power Loss Performance for Various MMCs Based on IGCT in HVDC Application
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DOI：
10.1109/jestpe.2018.2871191
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发表时间：
2019-06
影响因子：
5.5
通讯作者：
Biao Zhao;R. Zeng;Jianguo Li;Tianyu Wei;Zhengyu Chen;Q. Song;Zhanqing Yu
中科院分区：
文献类型：
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作者：
Biao Zhao;R. Zeng;Jianguo Li;Tianyu Wei;Zhengyu Chen;Q. Song;Zhanqing Yu
本文给出了一个全面的分析和表征的大功率集成门极换流晶闸管（IGCT）的功率损耗的模块化多电平变换器（MMC）的高压直流应用。详细分析了基于IGCT的MMC的实现方案、损耗模型、计算方法和特性。特别是对基于IGCT、压装绝缘栅双极晶体管（IGBT）、模块型IGBT、压装注入增强栅晶体管（IEGT）和模块型IEGT的半桥MMC（HB-MMC）和全桥MMC（FB-MMC）进行了综合比较。根据本文的研究，基于IGCT的MMC的缓冲器功率损耗远小于导通和开关功率损耗。在MMC中，IGCT的导通和开关功率损耗始终低于压装型和模块型IGBT和IEGTs。在相同的发射功率下，FB-MMC的功率损耗比HB-MMC高，这是因为FB-MMC采用了更多的开关。在考虑二极管的情况下，基于IGCT的HB-MMC和FB-MMC在不同工作状态下的功耗分别降低了1.9%~ 49.3%和8.3%~ 45.1%。本文的研究为IGCT在MMC中的应用提供了有价值的参考。
This paper gives a comprehensive analysis and characterization of power loss of a high-power integrated gate-commutated thyristor (IGCT) in a modular multilevel converter (MMC) for a high voltage dc application. The practical scheme, power loss models, calculation methods, characterization of MMC based on IGCT are analyzed in detail. Especially, a comprehensive comparison of both half-bridge MMC (HB-MMC) and full-bridge MMC (FB-MMC) based on IGCT, press-pack insulated gate bipolar transistor (IGBT), module-type IGBT, press-pack injection enhanced gate transistor (IEGT), and module-type IEGT is analyzed in this paper. According to the study in this paper, the snubber power loss of MMC based on IGCT is far less than the conduction and switching power losses. Both the conduction and switching power losses of IGCT are always lower than that of press-pack and module-type IGBTs and IEGTs in MMC. The power loss of FB-MMC is higher than that of HB-MMC with the same transmission power because more switches are employed in FB-MMC. If taking diodes into account, the HB-MMC and FB-MMC based on IGCT can decrease power loss about 1.9%–49.3% and 8.3%–45.1% under different operation states, respectively. The study in this paper will provide a valuable reference and promote the application of IGCT in MMC.